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    <title>404 Not Found</title>
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        body {
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
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        body a {
            text-decoration: none;
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    <h1>☹️ 404 Not Found</h1>
    <h2>😞 Oops! The page you are looking for does not exist.</h2>
    <p>☺️︎ Please check the URL or return to the homepage.</p>
    <a href="https://gitee.com/skyselang/yylAdmin" target="_blank">🚀 yyladmin</a>
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